EP 1157591 A1 20011128 - HID BALLAST WITH HOT RESTART CIRCUIT
Title (en)
HID BALLAST WITH HOT RESTART CIRCUIT
Title (de)
VORSCHALTGERÄT MIT HEISSWIEDERZÜNDUNGSSCHALTUNG FÜR EINE ENTLADUNGSLAMPE HOHER INTENSITÄT
Title (fr)
BALLAST A DECHARGE A HAUTE INTENSITE MUNI D'UN CIRCUIT DE REDEMARRAGE A CHAUD
Publication
Application
Priority
- US 0002027 W 20000126
- US 24022699 A 19990129
Abstract (en)
[origin: WO0045622A1] A ballast includes a hot restart circuit for hot restart of a HID lamp. In one embodiment, the hot restart circuit includes inductively coupled first and second inductive elements coupled end to end. A fist capacitor has a first terminal coupled to a point between the first and second inductive elements and a second terminal coupled to a switching element. When the switching element transitions to a conductive state, a voltage pulse is generated on the second inductive element and the corresponding pulse on the first inductive element is sufficient to achieve hot restart of the lamp. In one embodiment, the first capacitor and the second inductive provide a parallel resonant LC circuit. The resultant signal on the second inductive element increases a voltage on the first inductive element for hot restart of the lamp.
IPC 1-7
IPC 8 full level
H05B 41/04 (2006.01); H05B 41/288 (2006.01); H05B 41/38 (2006.01)
CPC (source: EP US)
H05B 41/042 (2013.01 - EP US); H05B 41/2881 (2013.01 - EP US); H05B 41/382 (2013.01 - EP US); Y02B 20/00 (2013.01 - EP US); Y10S 315/07 (2013.01 - EP US)
Citation (search report)
See references of WO 0045622A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0045622 A1 20000803; AU 2738700 A 20000818; CA 2361061 A1 20000803; EP 1157591 A1 20011128; US 6194843 B1 20010227
DOCDB simple family (application)
US 0002027 W 20000126; AU 2738700 A 20000126; CA 2361061 A 20000126; EP 00905753 A 20000126; US 24022699 A 19990129